Magnetism

• The magnetic field strength decreases as the distance from the wire increases.
• When a magnet is moved towards another magnet, it experiences an attractive force that pulls them together.
• Like poles repel and unlike poles attract.
• The magnetic field lines around the bar magnet are closed loops.
• Magnetic forces are always perpendicular to the direction of the magnetic field lines.
• Magnets exert forces on other magnets due to their magnetic fields.
• Earth's magnetic field is caused by its molten iron core.